Measurement of material dimensions
The invention relates to a method for determining material dimensions of a longitudinal profiled section ( 2 ) during a sawing process, in which a saw blade ( 3 ) is advanced, the longitudinal profiled section ( 2 ) being machined by said saw blade ( 3 ) along a saw groove during this time; advancement position data of said saw blade ( 3 ) along the advancement path (s) being determined and, during this sawing operation, additional measurement data being determined from the group of sawing force (F s ) or another variable which corresponds to the sawing force (F s ). The invention is characterised in that an actual profile is determined from the advancement position data and said additional measurement data.
1. A method for determining material dimensions of a tube ( 2 ) during a sawing process with a tube cutting machine, wherein
a circular saw blade ( 3 ) is fed forward,
the tube ( 2 ) is, in the course of feeding the circular saw forward, cut by the circular saw blade ( 3 ) along a saw groove;
feed position data (s 1 , s 2 , s 3 , s 4 ) of the circular saw blade ( 3 ) is determined along a feed path (s) of the circular saw blade,
during the sawing process, further measurement data from the group of sawing force (F s ) or another variable (M s ) that corresponds to the sawing force (F s ) is determined,
characterised in that
an actual profile of the tube is determined from the feed position data (s 1 , s 2 , s 3 , s 4 );
the further measurement data (F s , M s ) along with the diameter and the thickness of the tube ( 2 ) to be machined are input into the tube cutting machine;
target profile associated with the diameter and wall thickness input is determined in a database;
the target profile is compared with the actual profile and in case of any deviations that are above a predefined tolerance, a warning signal is output; and
extremal values are determined from the actual profile and the material dimensions are determined from the feed position data (s 1 , s 2 , s 3 , s 4 ) of the extremal values;
wherein a wall thickness (t) of the tube ( 2 ) is determined from the difference between the feed position data of the start of the cutting process (s 1 ) and the feed position data of a first maximum value (s 2 ).
2. The method as claimed in claim 1 , characterised in that the circular saw blade ( 3 ) is rotated and feed position data of a saw blade shaft ( 4 ) is measured along the feed path (s).
3. The method as claimed in claim 1 , characterised in that material dimensions of the tube are determined from the difference between the feed position data (s 1 , s 2 , s 3 , s 4 ) of two adjacent extremal values.
4. The method as claimed in claim 3 , characterised in that a diameter (d) of the tube ( 2 ) is determined from the difference between the feed position data of the end of the cutting process (s 4 ) and the feed position data of the start of the cutting process (s 1 ).
5. The method as claimed in claim 1 , characterised in that the tube ( 2 ) with a circular inner and a circular outer diameter is selected for further processing.